Mount Vernon, AR 72111 Frost Dates
Mount Vernon, AR: when does the frost end?
Typically, the last spring freeze lands around 04/04, roughly 219 days out. Fall's first freeze usually shows up around 10/31, roughly 209 days after the last spring frost.
Zone 8a (10 to 15°F average annual minimum) comes from the USDA Plant Hardiness Zone Map; the frost dates above are the 1991-2020 normal at the nearest reporting NOAA station for Mount Vernon, not a forecast for this year.
Stretching the season past the first frost
With roughly 9 weeks until Mount Vernon's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
Why 04/04 isn't a guarantee
04/04 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/16 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/20 and only about 1 year in 10 sees frost after that.
Mount Vernon against the rest of the dataset
At roughly 209 frost-free days, Mount Vernon places 15,441 of 40,283 ZIP codes in this dataset. Within AR, it ranks 553 of 687.
Learn more
Before leaning on 72111's figures: zone vs. frost date explains why Zone 8a and Mount Vernon's frost date answer different questions, while the frost range explains how to read the range around Mount Vernon's dates instead of trusting one.